Solar cells currently on the market are divided into amorphous silicon and crystalline silicon. Crystalline silicon can be divided into polycrystalline silicon and monocrystalline silicon. Judging from the photoelectric conversion efficiency of the three materials, they are: monocrystalline silicon (up to 17%) > polycrystalline silicon (12 to 15%) > amorphous silicon (about 5%). However, crystalline silicon (monocrystalline silicon and polycrystalline silicon) basically does not generate current under low light, and amorphous silicon is good under low light (it has very little energy under low light). Therefore, from an overall point of view, it is suitable to use monocrystalline silicon or polycrystalline silicon as the material for solar cells.
The next thing we need to focus on is the power of the solar panel. Generally speaking, the power of the solar panel is directly proportional to the surface of the solar wafer (the surface of). the solar cell slice is not completely equivalent to the solar panel area), because although some solar panels are large, the gaps between solar slices are very wide and the power of these solar panels is not necessarily high . our VSC-03 solar panel is not big, the pads are well arranged. The power of 0.75w is also achieved in terms of surface area). Generally speaking, the larger the power of the solar panel, the better, so that the current generated by sunlight is large and the built-in battery can be fully charged quickly. But in reality, you have to find a balance between the power of the solar panel and the portability of the solar charger. Generally speaking, we believe that the minimum power of solar charger cannot be less than 0.75W (a solar panel with thisThis power can generate a current of 140 mA under standard light intensity. The current generated under general sunlight is about 100mA.) If it is less than that. If the charging current is too small, there will basically be no obvious effect.
This is the simplest solar charging for you; answers: 1. It can be solved; 2. No need; 3. Increase the rated current of the diode to be greater than the operating current; The reverse leakage current is very low, almost zero.
If you want to protect your battery, it is best to purchase a solar charge protection device to prevent overcharging or overdischarging from affecting the battery life.